Organized in 1964 by and for former members of the University of Texas at Austin Longhorn Band, the Longhorn Alumni Band is a social and fundraising organization. At its founding, the band consisted of 67 members. It presently consists of more than 3,000 members, over 800 of which perform annually at the Alumni Band Day home football game halftime show.

Members perform shows throughout the year, the proceeds of which go towards funding scholarships for current Longhorn Band members. Scholarship fund assets are managed by the Longhorn Alumni Band Charitable Fund, established in 1988 as a separate non-profit corporation.